Interesting gas trap

[WarPig1976]

What is the rifle used for? My guess is it fires tracers as sighting rounds?


"Nuts"

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[ChipS]

My guess is it fires tracers as sighting rounds?

Mine, too. In the Korean war era they put an M8C .50 cal spotting rifle over the barrel of the M40A1 106 mm recoiless rifle. It works real well. My former MOS.

[RCS]

Same photo on the cover issue of Billy Pyle's "The Garand Stand Report" Fall 2012 #88. The GSR states photo was taken at Ft Sam Houston, TX in July 1942